It turns out that cucumber (0.10) is not able to handle an empty scenario outline.
e.g

@test
Scenario Outline: An Empty scenario outline example - Add Two Number
Given I have entered <num_1> into the calculator
And I press add
And I have entered <num_2> into the calculator
When I press add
Then the result <result> should be on the screen
Examples:
|num_1 | num_2 | result |

The reason I have an empty scenario outline is for a placeholder.

If you run the cucumber without using the tag (e.g bundle exec cucumber features\regression\simple_test), then cucumber will run just fine.

The fix is to just add examples into scenario outline or to comment out the scenarios.